Starting from Strategy 9.2.0, Object GUID's are stored as the UNIQUEIDENTIFIER data type if the metadata is hosted on Microsoft SQL Server. For example, before Strategy 9.2.0, the OBJECT_ID of the Administrator user account in the DSSMDOBJINFO table is stored as CHAR(32):
54F3D26011D2896560009A8E67019608
In Strategy 9.2.0 or newer, the OBJECT_ID is stored as:
54F3D260-8965-11D2-8E9A-006008960167
The switch is made in compliance with the most commonly used structure of the GUID. See
http://en.wikipedia.org/wiki/Globally_unique_identifier. In addition, storing an object's GUID as UNIQUEIDENTIFIER significantly reduces metadata size (~40%) and improves performance (up to 25% in certain search scenarios).